1.脱式计算.
| 18×15÷30 | 320÷40×60 | 729-3300÷75 |
| 8004÷(23×4) | 406×(152-89) | (1650+1290)÷28 |
18.□50÷5商是两位数,□可以填( )
| A. | 4 | B. | 5 | C. | 6 |
13.口算题.
0 159777 159785 159791 159795 159801 159803 159807 159813 159815 159821 159827 159831 159833 159837 159843 159845 159851 159855 159857 159861 159863 159867 159869 159871 159872 159873 159875 159876 159877 159879 159881 159885 159887 159891 159893 159897 159903 159905 159911 159915 159917 159921 159927 159933 159935 159941 159945 159947 159953 159957 159963 159971 199269
| 90÷3= | 900÷3= | 120÷4= | 270÷9= |
| 2100÷7= | 3000÷5= | 8000÷8= | 160÷2= |
| 400÷8= | 240÷3= | 1800÷9= | 1200÷6= |
| 73÷8= | 410÷7= | 435÷7= | 323÷4= |